WIP: adding initial user defaults

userDefaults.go

@@ -0,0 +1,38 @@
+package gocoa
+
+// #cgo CFLAGS: -x objective-c
+// #cgo LDFLAGS: -framework Foundation
+// #import "userDefaults.h"
+import "C"
+import "unsafe"
+
+// UserDefaults - user default settings
+type UserDefaults struct {
+	userDefaultsPtr C.UserDefaultsPtr
+}
+
+// NewPUserDefaults - creates a new UserDefaults object
+func NewPUserDefaults() *UserDefaults {
+	defaultsPtr := C.UserDefaults_New()
+	defaults := &UserDefaults{
+		userDefaultsPtr: defaultsPtr,
+	}
+	return defaults
+}
+
+// GetString - reads a string from userDefaults.
+func (defaults *UserDefaults) GetString(key string) string {
+	cKey := C.CString(key)
+	defer C.free(unsafe.Pointer(cKey))
+	value := C.UserDefaults_GetString(defaults.userDefaultsPtr, cKey)
+	return C.GoString(value)
+}
+
+// SetString - writes a string to userDefaults.
+func (defaults *UserDefaults) SetString(key string, value string) {
+	cKey := C.CString(key)
+	defer C.free(unsafe.Pointer(cKey))
+	cValue := C.CString(value)
+	defer C.free(unsafe.Pointer(cValue))
+	C.UserDefaults_SetString(defaults.userDefaultsPtr, cKey, cValue)
+}

userDefaults.h

@@ -0,0 +1,10 @@
+#import <Foundation/Foundation.h>
+
+// typedef void (*callback)(void);
+typedef void* UserDefaultsPtr;
+
+UserDefaultsPtr UserDefaults_New();
+
+void UserDefaults_SetString(UserDefaultsPtr defaultsPtr, const char*key, const char*value);
+
+const char* UserDefaults_GetString(UserDefaultsPtr defaultsPtr, const char*key);

userDefaults.m

@@ -0,0 +1,22 @@
+#import "userDefaults.h"
+#include "_cgo_export.h"
+
+UserDefaultsPtr UserDefaults_New()
+{
+    id nsUserDefaults = [NSUserDefaults standardUserDefaults];
+    return (UserDefaultsPtr)nsUserDefaults;
+}
+
+void UserDefaults_SetString(UserDefaultsPtr defaultsPtr, const char *key, const char *value)
+{
+    NSUserDefaults* defaults = (NSUserDefaults*)defaultsPtr;
+    [defaults setObject:[NSString stringWithUTF8String:value] forKey:[NSString stringWithUTF8String:key]];
+    [defaults synchronize];
+}
+
+const char* UserDefaults_GetString(UserDefaultsPtr defaultsPtr, const char *key) {
+    NSUserDefaults* defaults = (NSUserDefaults*)defaultsPtr;
+    NSString *value = [defaults stringForKey:[NSString stringWithUTF8String:key]];
+    const char *cValue = [value UTF8String];
+    return cValue;
+}

userDefaults_test.go

@@ -0,0 +1,22 @@
+package gocoa
+
+import (
+	"testing"
+)
+
+func TestNewPUserDefaults(t *testing.T) {
+	defaults := NewPUserDefaults()
+	if defaults.userDefaultsPtr == nil {
+		t.Fatalf("pointer to C defaults is nil!")
+	}
+}
+
+func TestStringValue(t *testing.T) {
+	defaults := NewPUserDefaults()
+	value := "FooBar!"
+	defaults.SetString("TestKey", value)
+	readValue := defaults.GetString("TestKey")
+	if readValue != value {
+		t.Fatalf("read value should be %s, but is %s", value, readValue)
+	}
+}